GB 50057-2010 第6.2.4条
| The equipotential bonding conductors (MEB) on each floor of the hotel (such as guest room floors, the lobby, and equipment floors) shall be connected to the lightning protection grounding system, with connecting conductors of not less than 25 mm² copper wire or 50 mm² galvanized flat steel. The equipotential bonding conductor on each floor shall form a ring or grid, and the grid size should not exceed 10 m × 10 m.